Ensure the child data is added to children-changed events properly.
Ensure the child data is added to children-changed events properly.

GNOME/at-spi2-atk,Distrotech/at-spi2-atk,Distrotech/at-spi2-atk,GNOME/at-spi2-core,GNOME/at-spi2-core,GNOME/at-spi2-core